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Details about  FIRE OBSIDIAN ~ ROUGH ~ THE RAREST OBSIDIAN ! RAINBOW ~ 4

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FIRE OBSIDIAN ~ ROUGH ~ THE RAREST OBSIDIAN ! RAINBOW ~ 4
FIRE-OBSIDIAN-ROUGH-THE-RAREST-OBSIDIAN-RAINBOW-4
Item Ended
Condition:
New
Ended:
07 May, 2013 12:25:57 BST
Price:
£28.00
Postage:
£3.75 Standard Delivery | See details
Item location:
Tain, Highland, United Kingdom

Description

eBay item number:
111040866488
Seller assumes all responsibility for this listing.
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Item specifics

Condition:
New: A brand-new, unused, unopened and undamaged item. See the seller's listing for full details. See all condition definitions- opens in a new window or tab
Type: Minerals/ Crystals
No. of Items: 1 Shape: SLICE ~ PHOTOGRAPHED WET
Location: USA Finish: Unpolished

FIRE OBSIDIAN

 

GLASS BUTTES , OREGON.

 

ONE OF THE RAREST OBSIDIANS IN THE WORLD !!


 

THIS ONE MEASURES : 4.2 X 2.7 X 1 cms.


 

A RARE CHANCE TO OWN A STUNNING STONE AT A GOOD PRICE ! GORGEOUS ! ONE OF MY ALL TIME FAVOURITES.

 

A variety of obsidian from Glass Buttes, Oregon, named for thin layers showing various colors and known as ‘fire’ obsidian, was investigated with FE-SEM, EDS, EBSD, and optical spectroscopy methods. Our study reveals that the thin layers consist of mainly concentrated nano-sized magnetite crystals. The thin layers having a thickness of 300 nm to 700 nm give rise to brilliant colors in reflection. The color is caused by thin-film interference where the thin layers have a higher calculated refractive index (n=1.495 ~1.512) than that of the host glass (n=1.484).

 

UNPOLISHED SLICE ~ PHOTOGRAPHED WET.


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THANKS AGAIN FOR YOUR CUSTOM.

ALL THE BEST WISHES , LIAM , ALLCRYSTALFINDER

Business seller information

Meikle Rhynie Cottage

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